ren i love making roux's!!!
i dont use a recipe but i think its meant to be equal parts butter and flour.
melt butter add flour and cook for 1 minute, add milk tiny amounts at a time (off heat) nix thoroughly keep going to all milk added, put bak on heat and heat til it thickens!
try 1tbs butter
1tbs flour
1 cup milk

i also cheat and make one in the microwave